VALVE SPECIFICATIONS
Year Engine 
ID/VIN		 Engine Displacement Liters (cc)  Seat Angle (deg.) Face Angle (deg.) Spring Test Pressure (lbs.@in.) Spring Installed Height (in.) Stem-to-Guide 
Clearance - Intake (in.)		 Stem-to-Guide Clearance - Exhaust (in.) Stem 
Diameter (in.) Intake		 Stem 
Diameter (in.) Exhaust
1982 A 1.9 (1949) 45 45 * @ 0.0009-0.0079 0.0015-0.0097 0.3102 min 0.3091 min
B 2.8 (2835) 46 45 88@1.575 1.575 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
1983 A 1.9 (1949) 45 45 * @ 0.0009-0.0079 0.0015-0.0097 0.3102 min 0.3091 min
Y 2.0 (1990) 46 45 77@1.598 1.598 0.0011-0.0026 0.0014-0.0031 0.3410-0.3416 0.3410-0.3416
S 2.2 (2238) 45 45 # $ 0.0015-0.0079 0.0025-0.0079 0.3100 min 0.3090 min
B 2.8 (2835) 46 45 88@1.575 1.575 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
1984 A 1.9 (1949) 45 45 * @ 0.0009-0.0079 0.0015-0.0097 0.3102 min 0.3091 min
Y 2.0 (1990) 46 45 77@1.598 1.598 0.0011-0.0026 0.0014-0.0031 0.3410-0.3416 0.3410-0.3416
S 2.2 (2238) 45 45 # $ 0.0015-0.0079 0.0025-0.0079 0.3100 min 0.3090 min
B 2.8 (2835) 46 45 88@1.575 1.575 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
1985 A 1.9 (1949) 45 45 * @ 0.0009-0.0079 0.0015-0.0097 0.3102 min 0.3091 min
S 2.2 (2238) 45 45 # $ 0.0015-0.0079 0.0025-0.0079 0.3100 min 0.3090 min
E 2.5 (2474) 46 45 78-86@1.66 1.690 0.0010-0.0027 % 0.3418-0.3425 0.3418-0.3425
B 2.8 (2835) 46 45 88@1.575 1.575 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
1986 E 2.5 (2474) 46 45 78-86@1.66 1.690 0.0010-0.0027 0.0010-0.0027 0.3418-0.3425 0.3418-0.3425
R 2.8 (2835) 46 45 88@1.575 1.575 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
1987 E 2.5 (2474) 46 45 78-86@1.66 1.690 0.0010-0.0027 0.0010-0.0027 0.3418-0.3425 0.3418-0.3425
R 2.8 (2835) 46 45 88@1.575 1.575 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
1988 E 2.5 (2474) 46 45 78-86@1.66 1.690 0.0010-0.0027 0.0010-0.0027 0.3418-0.3425 0.3418-0.3425
R 2.8 (2835) 46 45 88@1.575 1.575 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
Z 4.3 (4293) 46 45 76-84@1.70 1.690-1.710 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
1989 E 2.5 (2474) 46 45 71-78@1.44 1.44 0.0010-0.0025 0.0013-0.0030 0.3133-0.3138 0.3128-0.3135
R 2.8 (2835) 46 45 88@1.575 1.575 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
Z 4.3 (4293) 46 45 76-84@1.70 1.690-1.710 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
1990 E 2.5 (2474) 46 45 71-78@1.44 1.44 0.0010-0.0025 0.0013-0.0030 0.3131-0.3138 0.3128-0.3135
R 2.8 (2835) 46 45 88@1.575 1.575 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
Z 4.3 (4293) 46 45 76-84@1.70 1.690-1.710 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
1991 A 2.5 (2474) 46 45 71-78@1.44 1.44 0.0010-0.0025 0.0013-0.0030 0.3131-0.3138 0.3128-0.3135
E 2.5 (2474) 46 45 71-78@1.44 1.44 0.0010-0.0025 0.0013-0.0030 0.3131-0.3138 0.3128-0.3135
R 2.8 (2835) 46 45 88@1.575 1.575 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
Z 4.3 (4293) 46 45 76-84@1.70 1.690-1.710 0.0010-0.0027 0.0010-0.0027 0.3410-0.3417 0.3410-0.3417
1992 A 2.5 (2474) 46 45 71-78@1.68 1.697 0.0010-0.0025 ^ 0.3131-0.3138 &
R 2.8 (2835) 46 45 88@1.575 1.575 0.0010-0.0027 0.0010-0.0027 NA NA
Z 4.3 (4293) 46 45 76-84@1.70 1.690-1.710 0.0010-0.0027 0.0010-0.0027 NA NA
1993 A 2.5 (2474) 46 45 71-78@1.68 1.697 0.0010-0.0025 ^ 0.3131-0.3138 &
R 2.8 (2835) 46 45 88@1.575 1.575 0.0010-0.0027 0.0010-0.0027 NA NA
Z 4.3 (4293) 46 45 76-84@1.70 1.690-1.710 0.0010-0.0027 0.0010-0.0027 NA NA
1994 4 2.2 (2189) 46 45 79-85@1.64 ! 0.0011-0.0027 0.0014-0.0031 NA NA
W 4.3 (4293) 46 45 76-84@1.70 1.690-1.710 0.0011-0.0027 0.0011-0.0027 NA NA
Z 4.3 (4293) 46 45 76-84@1.70 1.690-1.710 0.0010-0.0027 0.0010-0.0027 NA NA
* - Inner: 16-21@1.516, Outer: 30-37@1.614    @ - Free length, inner: 1.784, Outer: 1.847    # - Inner: 11-14@1.456, Outer: 40-49@1.535
$ - Free length, inner: 1.805, Outer: 1.832 - MINIMUMS     % - Top: 0.0010-0.0027, Bottom: 0.0020-0.0037
^ - Upper:0.0013-0.0030, Lower: 0.0024-0.0041     & - Upper: 0.3129-0.3137, Lower: 0.3118-0.3126    ! - Free length: 1.89-1.94

If you have any information that is not listed and would like to contribute, please send E-mail to Hellcat1@S-Series.Org and I will add it.